Employee Benefit Plans (Details) - Schedule Of Amounts Recognized In Balance Sheet - USD ($) $ in Millions	May 31, 2019	May 31, 2018
Other Postretirement Benefits [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Current liabilities	$ (1.8)	$ (2.2)
Non-current liabilities	(21.6)	(24.6)
Net funded balance	(23.4)	(26.8)
U.S. [Member] \| Pension Plans [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Current liabilities		0.0
Non-current liabilities		0.0
Net funded balance	0.0	1.6
U.K. [Member] \| Pension Plans [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Current liabilities	0.0	0.0
Non-current liabilities	(9.1)	(9.2)
Net funded balance	(9.1)	(9.2)
Current Assets [Member] \| Other Postretirement Benefits [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Plan assets	0.0	0.0
Current Assets [Member] \| U.S. [Member] \| Pension Plans [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Plan assets		1.6
Current Assets [Member] \| U.K. [Member] \| Pension Plans [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Plan assets	$ 0.0	$ 0.0

Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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- Definition

Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans.

+ References

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- Definition

Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current.

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- Definition

Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent.

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